- Correspondence to Dr Mark Petticrew, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine (LSHTM), 15-17 Tavistock Place, London WC1H 9SH, UK;
- Received 13 July 2017
- Revised 4 August 2017
- Accepted 10 August 2017
- Published in print 29 September 2017.
- Published online 4 October 2017.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.